adds docs about MacOS support

[techytoes]

This PR adds Communication plugin support for MacOS. Also corrected minor typos in serverCommunication.inl file.

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This PR:

• [ ] builds with SUCCESS for all platforms on the CI.
• [ ] does not generate new warnings.
• [ ] does not generate new unit test failures.
• [ ] does not generate new scene test failures.
• [ ] does not break API compatibility.
• [ ] is more than 1 week old (or has fast-merge label).

Reviewers will merge only if all these checks are true.

[damienmarchal]

Hi @firedranzer

Thanks you for you PR. I'm adding erwan to this group so he can handle the workflow.